Cylinder lock



' S. A. LISS CYLINDER LOCK Aug. 13, 1935.

Ofiginal Filed March :51, 1933 Patented Aug. 13, 1935 f'samui A, tis', Philadelphia, i s-. lama Briggs iar Stratton Corporatiomfl'Milwaukee, i

'f Wis, a. corporation of Delaware 1 663,805. Divided and thisap licationJune 29,

am qsaosi This invention relates to improvements in cylinder locks and is a division of the popending application of Samuel -A.'Liss, SerialNo.663,'805, filed'March 31,1 933. f 7

It is an objector this-invention toprovide novel means l for removably securing the cylinder of .a. Flock in its casing or mounting'rnember.

.z Moreispecifically, it is an objectofilthis 'inven- 1 tionjtoprovide' means .for'-' removably. securing, a-cylinder in its casing,.0r mountingmember;

which is mounted at theginner endof ,thelock and, is releasable by va. special key, -inserted,-.into

the keyway.

Withthe above and other objects in will appear as thedescription proceeds, this invention resides in the novel construction, com-' bination and arrangement of parts substantially.

as hereinafter described and more particularly defined by the appended claims, it being understood that such changesin the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

The accompanying drawing illustrates one complete example of the physical embodiment of the'invention constructed according to the best mode so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a side view partially'broken away and in section, illustrating a lock embodying this invention; I

Figure 2 is a view similar to Figure 1, showing the manner of releasing thesecuring means;

Figure 3 is an end View of the lock; and Figure 4 is a detail perspective view of the inner end of the lock showing the special key in position and the securing means released;

Referring now more particularly to the acj companying drawing, in which like numerals indicate like parts throughout the several views, the numeral 4 designates the casing or mounting member of the lock, bored as at 5, to receive a cylinder 6. The cylinder has a keyway 1 extended longitudinally therethrough to receive a key 8 insertable from the front end of the keyway in the customary manner.

The key 8 is adapted to engage and retract a: plurality of tumblers '9 mounted in the cylinder.

The tumblers ma be arranged to project from the cylinder for interlocking engagement with the casing or mounting member to secure the cylinder against rotation, or as in the aforesaid copending application, may serve as means to control locking members movable radially in the cylinder to and from interlocking engagement with the casing or mounting member.

7 by so sfl4."

.I Inasmuch as thespecific, man er in whichlthe cylinder, is secured fagainstljjrotation forms .no part Lot this ,invention, these locking members haye'notbeenishown. f l

The cylifi'der is secured against endwise s a. ment"b'y'a flange, l atlthe" front end \bflthe cylinder: engaging in aj cou nterborefll I; and co'o'p erating withja releasable retainingmember l2 at the innerendjof the cylinder Therelea'sable retainingmember 12 is in the form" of a radially slidablefbolt mounted orijthe. nner. end m indr and guided for am motion by n angle r3 fixed e rarwar'dlyprojecting"flange l5 'of "the angle plate is engageable with lock mechanism (not shown) to transmit rotation from the cylinder to such mechanism.

The releasable locking member or bolt [2, .is guided for radial reciprocation by being received in a slot I6 cut into the angle plate and is yieldably urged outwardly to project its outer end over the adjacent end of the casing or mounting member by a spring H. The spring I1 is confined between,

and supported by lugs l8 and I9 struck from the angle plate and the releasable securing bolt, re-

spectively.

To afiord metal for the' lug IS, the bolt I2 is slotted inwardly from its outer end and the slot formed thereby is in line with the inner end of the keyway to receive the nose of a special key 20.

As shown in Figure 2, the insertion of the special key 20, which is longer than the regular key shown in Figure 1, lifts the retaining bolt against the action of its spring H to a position at which its outer end clears theinner periphery of the bore 6 and thus frees the cylinder for withdrawal.

' It is, of course, understood that the special key, besides releasing the retaining bolt, also acts properly on the tumblers to retract them to their unlocked positions to thus free the cylinder from 7 its casing in all respects.

From the foregoing description taken in conmotion with the accompanying drawing, it will member and for transmitting rotation of the cylinder to mechanism to be actuated, and said retaining bolt being accessible from the inner end of the keyway whereby it is movable to inoperative position by a special key inserted through the keyway.

2. In a look, a bored mounting member, .a lock cylinder rotatable in the mounting member bore and having a keyway extending longitudinally.

therethrough, means to removably secure the cylinder in the mounting member including a releasable retaining bolt slidable radially across the inner end of the keyway to and from an operative position engaging the mounting member, means fixed to the inner end of the cylinder to so slidably mount the retaining bolt, a spring confined between portions of said retaining bolt and said means to yieldably project the retaining bolt to its operative position, and said retaining bolt having bolt, means to mount the retaining bolt for radial 'sliding'movement acrossthe' inner end'of the keywayto and from an operative positionengaging the mounting member, a .lugstruok laterally from the retaining bolt to provide a springv seat, a spring engaging said seat and part of the an operative position engaging the mounting means for mounting the bolt to yieldably urge the bolt to its operative position, the formation of the lug leaving a slot in the retaining bolt in line with the inner end of the keyway to receive the nose of a special key inserted into the keyway, and the base of the lug which forms the inner end of the slot providing azshoulder against which the nose of the special key engages to move the retaining bolt against the action of its spring but of its operative position.

4. In a lock, a bored mounting member, a lock cylinder in the mounting member bore and having a keyway extending longitudinally therethrough,- andmeans to removably secure the lock nyl-inder in the mounting member bore comprising aretaining bolt overlying the inner end of the cylinder, amember detachably secured to the inner end of the cylinder and engaging the retaining bolt to hold the same assembled with the cylinder and slidable radially thereof past the keyway, spring means connected with the retaining bolt and said member to yieldingly urge the bolt to a position projecting one end beyond the edge of the cylinder and into operative engagement with the mounting member, cooperating abutments on the retaining v bolt and said member to innit; outward projection of the retaining bolt by :said spring means, and means on said retaining bolt accessible from the inner end of the keyway to enable movement of the retaining bolt to inoperative posi-tion disengaged from the mounting member by a special key inserted through the keyway SAMUEL A. LISS. 

